The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 2006
Filed:
Oct. 31, 2001
Filip Zalio, Victoria, AU;
Dobrica Vasic, Victoria, AU;
Filip Zalio, Victoria, AU;
Dobrica Vasic, Victoria, AU;
NEC Corporation, Tokyo, JP;
Abstract
An automatic gain control circuit () for a direct sequence spread spectrum receiver. A discrimination unit () generates a discrimination signal error from received in-phase and quadrature base band signals, whilst multiplication unit () multiplies the discrimination signal error by a first loop gain constant during signal acquisition and a second different loop gain constant during signal tracking. A recursive integrator () then acquires an integrated AGC value from the multiplied discrimination signal error. By using two different values of loop gain, the circuit is able to alternate between a 'fast mode' during signal acquisition, and a 'slow track' mode during signal tracking.